Home / 210,019.56-289,849.20-128,395.62

Finding the Fourth Proportional to 210,019.56, 289,849.20 and 128,395.62

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Solution

The fourth proportional to 210,019.56, 289,849.20 and 128,395.62 is: 177,199.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,019.56 : 289,849.20 = 128,395.62 : x
  2. Step 2: Convert to fraction form
    210,019.56/289,849.20 = 128,395.62/x
  3. Step 3: Cross multiply
    210,019.56x = 289,849.20 × 128,395.62
  4. Step 4: Simplify right side
    210,019.56x = 37,215,367,740.50
  5. Step 5: Solve for x
    x = 37,215,367,740.50/210,019.56
  6. Step 6: Final answer
    x = 177,199.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.